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Re: exhaust size ??
A friend of mine built a 327 that was pumping out about 360HP and he was running a 2 1/4 exhaust with a crossover. He was running a 3.08/1 gear in the back with a saginaw 3 speed originally that he changed to a Muncie Four Speed and he was getting about 21 miles to the gallon on the freeway at about 65 MPH and that thing was a screemer. It was extremely fast at least for me it was. One thing to remember about exhaust is the bigger diameter the slower the velocity and the louder it will be. It will also slow down your low end. Good luck with your exhaust system.
JRBECK64
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